Lock and latch



(No mam.) 2 sneets-'sheet 1. W. I. ALVORD.

LOOK AND LATGH.

Patented Aug. 17, 1886.

N. Prrzns. Pncm-uxhumpw, wz-ningm". D. c.

(No Model.) 2 Sheets-Sheet 2.

.W. I. ALVORD.

, LOGK AND LATGH. No. 347,414. Patented Aug. 1'7, 1886.

I i derstand the same, I will proceed to describe its I ingin proper relative position subsequent to showing especially the relative position of the 'Latches'; and I do hereby declare the follow- UNITED STATES PATENT OFFICE.

71NLLISTON I. ALVORD, OF BRIDGEPORT, CONNEOTICUT.

LOCK AND LATCH.

SPECIFICATION forming part of Letters Patent No. 347,414, dated `August: 17, 1886.

Application filed May 24, 1886. Serial No. 203,090. (No model.)

T0 aZZ whom it may concern:

Be it known that I, WILLIsToN I. ALVORD, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and Statel of Oonnecticut, h'ave invented certain new and useful Improvements in Locks and ing to be a full, clear, and exac't description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in devices for operating looks and latches, Sto., and has for its object to provide means readily attached to' or detached from the bolt r latch for Operating the latter and securing the same in locked position, and furthermore to greatly simplify the construction of superior looks; and with these endsinvie'w my in'vention consists in certain details of construction and combination of elements hereinafter fully and in detail explained, and then specially designated by the claini.

In'order that those skilled in the art to which my invention appertains may more fully unconstruction and operation in detail, referring by letter to the accompanying drawings, forming apart of this specification, in which Figurelis a plan view of my. improvement enibodied in the form of a dead-lock, the npper case being removed, the several'parts bethe retraction of the bolt and before the removal of the key; Fig. 2, a similar view, but

tumblers and forward stopafter the removal of the key; Fig. 3, a View similar to Fig. 1, but showing the bolt only half-way projected; Fig. 4, a section at the line w w of Fig. 1; Fig. 5, a detail plan view of my improvement, the upper shell being removed; Fig. 6, a detail perspective of the tumbler shell; Fig. 7, a view similar to Fig. 1, but showing especially the relative position of the parts after the bolt has been thrown forward; and Fig. 8 a view similar also to Fig. 1, but showing my improvement especially adapted to a springlatch.

Similar letters denote like parts in the several figures of the drawings.

A is the lock-casing.

B is a shell having lateral gatings O opposite to each other.

D are tumblers arranged within said shell, one upon the other, and E are Springs which bear against said tumblers, and thereby impart to them a spring action. The extremities of these tumblers extend through the gatings C beyond the shell, for the purpose presently explained. F are hubs on the shell, circular in shape and adapted in assembled position to project within oorresponding openings in the lock-casing, as seen at Fig. 4:.

G is the key-hole formed through the hubs, and H is a fin extending from the inner Wall of the shell in alignment with one side of said key-hole, so as to afford a guide for the key.

I is a lug projecting from the shell and provided With a depending pin, J, adapted to be inserted within an opening, b, in the'shank of the bolt or latch.

K is a stop formed integral with or secured to the lock-casing, and L is also a stop pivoted within said casing.

M isa spring,which bears against this stop L in such manner as to throw it in its normal position very near to the shell, the movement of the stop being limited-by post-s N in the casing.

The key may have any suitable wards, a, adapted to operate against the inner edges of the tumblers opposite the -fin I.

The operation of my improvement is asfollows: The shell, with the tumblers properly arranged therein, as described, is placed within the lock-casing A, and the pin J inserted within the opening b in the bolt O. The key is introduced, and by throwing the wards 90 against the inner forward edges of the tumblers the shell is rotatcd thereby, withdrawing the bolt and forcing the forward extremities of the tumblers beyond the stop L, which latter, by its spring action, will then be projected toward the shell and immediately nnderneath said extremities, as shown in Fig. 1. The bolt is securely held in this retracted position during the returning of the key by the abutment of the aforesaid extremities against Ioo the stop L. hen the key has been turned back to its normal position preparatory to re moval the tumblers will have been forced rearward by the springs E, so that the rear extreniitics of said tumblers will be thrown against the lower inclined portion of the stop K. The bolt will thus be held in this position by the abutment of the tumblers against this inoline, as shown in Fig. 2. VWhen the shell is turned by the key in the reverse direction to throw the bolt forward, the rear extremitics of the tumblers will ride up the in- 'clined surface of the stop K until they are brought beyond said stop, when they will by their spring action shoot rearward, and by their abutment against the upper side of this stop secure the bolt in this projeoted position, as shown at Fig. 7. Then the several parts are in this latter dcsignated position and it is desired to retract the bolt, the key is inserted and turned against the forward inner edges of the tumblers. as before set forth, thereby bringing the latter in such position that they will pass the stop K and the lower end of the stop L. As the shell revolves by the action of the key the forward extremities of the tumblers will strike against the upper portion of the stop L, and after passing beyond the same will shoot beyond it, as shown -at Fig. l. Since the stop L is pivoted and thrown toward the shell in lnormal position by the spring M, it is obvious that the upper extremity of the stop will be nearest the shell` since it is farthest from the pivotal point. rllherefore, the location of this pivotal point with relation to the shell and tumblers and the construction of the stop are such that the tumblers when thrown forward by the key will pass the lowei` end of the stop and abut against the latter along its upper edge, and thereby force it back against V its spring action until thenpperend is passed, l

when the stop will shoot underneath the tuniblers, as hereinbefore explained.

In applying my improvement to a springlateh, as shown at Fig. S, both stops K are stationary, as it is not necessary to hold the tumblers during the re-turning of the key, owing to the fact that the projection of the lateh does not of course effect any disadvantage-when the door eontaining the latch is opened. In the case of a bolt or dead-lock, however, if the bolt were shot forward When the key was turned back to normal position, the door would have to be opened before the key was so turned, and when opened it would be impossible to close the same after the withdrawal of the key, since the bolt would project.

l do not wish to be contincd to any particular shape or location of stops, as it is only necessary that they shall aft'ord looking-points to arrest the movements of the shell at certain times.

Having thus described my invention, what I elaim as new, and desire to secure by Letters Patent, is-

In combination with a lateh or bolt, a shell capable of motion around a center, and detac-hably connected to the shank of the latch or bolt, spring-aetuated tumblers arranged within said shell and extending laterally beyond the sides thereof, and means, as a stop, against which the extremities ot' the tumblers may engage, whereby the niovenient of the shell may be arrested at certain times, substantially as set forth.

lin testimony whereof I aftix my signature in presenee of two witnesses.

\VILLISTON I. ALVORD.

\Vit nesses:

T. \V. SMITH, J r., S. H. HUBBARD. 

